Hobbies & DIY

qqTimer times Rubik’s Cube solves and records sessions, with scramble options and controls for penalties and timer settings.

This Portuguese-language repository contains the blog source for Dungeons & Dragons 5th Edition content.

VGM Sound Sources documents video game music sound sources in a spreadsheet, including product and instrument details.

Musicca offers free music theory exercises for reading, writing and playing music, including notes, rhythm, intervals and chords.

Knots 3D offers step-by-step animated instructions for tying more than 200 knots.

QRZ provides a callsign database alongside amateur radio news, technical articles, discussion and practice exams.

CubeDesk times Rubik’s Cube solves and includes one-on-one play, algorithm training, leaderboards and mini-games.

Pawn Appetit brings chess analysis, repertoire training, engine and database management into one open-source toolkit.

McLelun publishes anime-style background painting tutorials using Photoshop, Blender 3D and After Effects.

HamExam offers free amateur radio practice exams and flash cards for Technician, General and Amateur Extra licenses.

Sight Reading Factory generates customizable sight-reading exercises on demand for students and educators.

DM Screen provides tabletop role-playing reference lists and generators for items, names, shops and traps.

Chesskit lets users review, play, learn and analyze chess on different devices with Stockfish.

Drumeo offers beginner drum lessons, including a free video series with COOP3RDRUMM3R.

LOW←TECH Magazine describes its website as solar powered and notes that it may sometimes go offline.

Oolimo provides a guitar chord reference with diagrams, chord finding, analysis, theory and quizzes.

Chromatone uses color-coded guides to teach music concepts including notes, chords, scales, rhythm and harmony.

Hooktheory analyzes chord progressions across songs and shows common progressions and likely next chords.

RadioReference provides radio frequency and scanner databases, with account and user submission tools.

GuitarScale presents guitar and bass scales through fretboard diagrams, explanations and exercises.

KaTrain helps Go players train with KataGo to improve their Baduk skills.

Waltheri’s Go Pattern Search searches professional games for joseki, fuseki and other board positions.

CubeDB provides cube puzzle solving tools for a range of twisty puzzles, with color controls and solve options.

Songsterr provides guitar, bass and drum tabs with play-along audio and can create tabs from YouTube links using AI.